A strong jobs report boosted the markets during the midday with the Dow climbing 87 points to 15,681. Nasdaq surged 53 points 3910.

On the upside

Elliott Associates purchased a 10.4% stake in Riverbed Technology (Nasdaq: RVBD) and has urged the company to strategic options.

Universal Display (Nasdaq: OLED) reported an unexpected profit for the third quarter as revenue more than doubled to surpass analyst expectations.

Halozyme Therapeutics (Nasdaq: HALO) narrowed third quarter losses as revenue tripled to top estimates.

On the downside

UniPixel (Nasdaq: UNXL) widened third quarter losses as expenses soared.

Geron (Nasdaq: GERN) narrowed third quarter losses but revenue fell short of expectations.

AVG Technologies (NYSE: AVG) reported sharply lower third quarter earnings and forecast current quarter results below expectations.

In the broad market, advancing issues barely edged out decliners by a slim margin on the NYSE while advancers outpaced decliners by more than 5 to 2 on Nasdaq. The broader S&P 500 climbed 15 points to 1762.